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// SPDX-License-Identifier: GPL-3.0-or-later
#include "TableGenBackends.h"
#include <cstdint>
#include <ostream>
#include <span>
#include <sstream>
#include <string>
#include <string_view>
namespace rcc::targetgen {
namespace {
void emitPhysicalRegisterArray(std::ostream &Output, const NormalizedTargetModel &Model,
std::string_view Name, std::span<const std::uint32_t> IDs) {
Output << "const std::array<PhysicalRegister, " << IDs.size() << "> " << Name << " = {{\n";
for (const std::uint32_t ID : IDs)
Output << " physical(PhysicalRegisterID::" << findRegister(Model, ID).Symbol << "),\n";
Output << "}};\n";
}
} // namespace
std::string emitCallingConventions(const NormalizedTargetModel &Model) {
std::ostringstream Output;
for (const NormalizedCallingConvention &Convention : Model.CallingConventions) {
const std::string Prefix = "CC" + std::to_string(Convention.ID);
emitPhysicalRegisterArray(Output, Model, Prefix + "IntegerArguments",
Convention.IntegerArgumentRegisters);
emitPhysicalRegisterArray(Output, Model, Prefix + "FloatingArguments",
Convention.FloatingArgumentRegisters);
emitPhysicalRegisterArray(Output, Model, Prefix + "IntegerReturns",
Convention.IntegerReturnRegisters);
emitPhysicalRegisterArray(Output, Model, Prefix + "FloatingReturns",
Convention.FloatingReturnRegisters);
}
Output << "const std::array<CallingConventionInfo, " << Model.CallingConventions.size()
<< "> GeneratedCallingConventions = {{\n";
for (const NormalizedCallingConvention &Convention : Model.CallingConventions) {
const std::string Prefix = "CC" + std::to_string(Convention.ID);
Output << " {CallingConvention::" << Convention.Symbol << ", ";
appendQuoted(Output, Convention.Name);
Output << ", RegisterClassID::fromValue(" << Convention.IntegerRegisterClass
<< "), RegisterClassID::fromValue(" << Convention.FloatingRegisterClass << "), "
<< Prefix << "IntegerArguments, " << Prefix << "FloatingArguments, " << Prefix
<< "IntegerReturns, " << Prefix << "FloatingReturns, ";
appendQuoted(Output, Convention.PreservedMaskName);
Output << ", " << Convention.StackAlignmentBytes << ", "
<< Convention.StackArgumentAlignmentBytes << ", " << Convention.ShadowSpaceBytes << ", "
<< (Convention.SupportsVarArgs ? "true" : "false") << ", "
<< (Convention.SupportsTailCalls ? "true" : "false") << "},\n";
}
Output << "}};\n";
return Output.str();
}
} // namespace rcc::targetgen
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